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Rare earth luminescent material and its preparation method

A rare earth luminescence and rare earth technology, applied in the field of luminescent materials containing rare earth elements and their preparation, can solve the problem that the luminous efficiency of phosphors needs to be further improved and the like

Active Publication Date: 2013-11-27
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the luminous efficiency of the above-mentioned phosphors needs to be further improved.

Method used

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  • Rare earth luminescent material and its preparation method

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preparation example Construction

[0020] The preparation method of the above-mentioned rare earth luminescent material comprises the following steps:

[0021] (1) The metal nanoparticles are surface-treated, that is, at least one of gold (Au), silver (Ag), platinum (Pt), palladium (Pd) and copper (Cu) metal nanoparticles is added to the polyvinylpyrrolidone solution, stir well.

[0022] (2) Add Al to the above solution 3+ solution and surfactant, stir well. Among them, the Al 3+ The solution is preferably AlCl 3 solution, Al 2 (SO 4 ) 3 solution, Al(NO 3 ) 3 at least one of the solutions. The surfactant is at least one of polyethylene glycol, ethylene glycol, isopropanol and polyvinyl alcohol, preferably polyethylene glycol with a molecular weight of 2000-10000.

[0023] (3) Slowly add the precipitating agent dropwise under the condition of a water bath at 0-100°C, stir for 1.5-5 hours, then age, then filter, wash and dry the precipitate. Among them, the precipitating agent is NH 4 HCO 3 , NH 3 h...

Embodiment 1

[0030] At room temperature, weigh 0.30 g of polyvinylpyrrolidone (PVP) and dissolve it in 5 mL of deionized water, then add 6 mL of 1×10 -2 mol / L platinum nanoparticles, stirred for 18h, then added 12mL of 1mol / L AlCl while stirring 3 , isopropanol 5mL, after stirring evenly, slowly add 30mL 4mol / LNH 4 HCO 3 , stirred and reacted for 5 hours, and then aged for a certain period of time. The precipitate was filtered, washed, dried, and heat-treated at 500°C for 8 hours to obtain Al 2 o 3Pt powder, where Al:Pt=1:5×10 -3 . Then weigh 1.0698g of Y 2 (CO 3 ) 3 , 0.5098g Al 2 o 3 Pt, Ce at 0.0046g 2 (CO 3 ) 3 , placed in an agate mortar and ground until well mixed, then transferred the powder to a corundum crucible, and placed in a tube furnace at 95% N 2 plus 5%H 2 Burn at 1700°C for 2 hours in a weak reducing atmosphere, cool to room temperature, and grind into powder to get Y 2.99 Ce 0.01 al 5 o 12 Pt luminescent material.

[0031] Such as figure 1 Shown as Y ...

Embodiment 2

[0033] At room temperature, weigh 0.1g PVP and dissolve it in 4mL deionized water, dissolve, then add 6mL1×10 -3 mol / L Ag nanoparticles, stirred for 12h, then added 6mL 2mol / L Al(NO 3 ) 3 , 6mL of 4% (V / V) polyvinyl alcohol aqueous solution, after stirring evenly, slowly add NH 3 h 2 O, until pH = 9, stirred for 3 hours, and then aged for a certain period of time. The precipitate was filtered, washed, dried, and heat-treated at 900°C for 4 hours to obtain Al 2 o 3 Ag powder, where Al:Ag=1:2.5×10 -4 . Then weigh 0.6322g of Y 2 o 3 , 0.5098g Al 2 o 3 Ag, 0.0275g CeO 2 , 0.0448g Tb 4 o 7 Put it in an agate mortar and grind until it is evenly mixed, then transfer the powder to a corundum crucible, reduce it with carbon powder in a muffle furnace, burn it at 1500°C for 4 hours, cool it to room temperature, and grind it into a powder to get Y 2.80 Tb 0.12 Ce 0.08 al 5 o 12 Ag luminescent material.

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Abstract

The invention relates to a rare earth luminescent material, which comprises rare earth-aluminate (gallate) acid salt coated with metal nanometer particles, the composition general formula is Y3-xLnx(Al1-y Gay)5O12@M, wherein: 0<x<=0.5; Ln is at least one of cerium (Ce) and terbium (Tb); 0<=y<1.0; @ expresses coating; M is at least one of metal nano particles of gold (Au), silver (Ag), platinum (Pt), palladium (Pd) and copper (Cu); the mol ratio of M to Al is z, 0<z<=1*10<-2>. The rare earth luminescent material has the advantages of high luminescent efficiency. The invention also provides a method for preparing a rare earth luminescent material.

Description

【Technical field】 [0001] The invention relates to a luminescent material, in particular to a luminescent material containing rare earth elements and a preparation method thereof. 【Background technique】 [0002] At present, as a new type of high-efficiency luminescent material, rare earth luminescent materials have developed into important luminescent materials in the fields of information display, lighting source, and optoelectronic devices. By increasing the luminous intensity of the rare earth luminescent material, the performance of the luminescent device can be effectively improved, and at the same time, the luminous efficiency of the device can be improved and energy can be effectively saved. Therefore, the research and application of luminescent materials with high luminous efficiency has always been an important research content in the fields of material chemistry and material physics. [0003] Traditional phosphors prepared using rare earth luminescent materials, su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/87C09K11/80C09K11/02
Inventor 周明杰王荣马文波
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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